SteamyTea

Almost. PUs do not need water to cure, but water is a 'blowing' agent that makes it expand. It is the isocyanate that makes the polyols harden. CFCs are another blowing agent, but they have been phased out, fluorine is wicked element, wants to react with just about everything, so was not good for the workers making furniture and car seats. Isocyanate and CFC make for an interesting combination in chemistry.

Try explaining to them how water based paints set and then can't been softened with water.

No matter how often we say that, it does not sink in. Cure and Set are my preferred terms for the hardening.

You may well find that there are still terminals and depots though. A lot of fuel is delivered by underground pipework. https://en.wikipedia.org/wiki/UK_oil_pipeline_network Why I never got disturbed by fuel trucks much when I lived near Buncefield. Eventhough it was a fuel truck that was involved in the explosion.

Was not on Radio 4. So I assume it was local independant radio. A valuable service for a few 10s of people.

What was it Prince Phillip said about 'done by Indians'.

Same down here. Not as if the CCTV at Plymouth is that far away. Think it was more to do with local infrastructure, rather than the bulk transport if power, which is very cheap. We did get a 5p/litre reduction on transport fuel 'because we are so far away from a depot', but that vanished during COVID when fuel dropped to a quid a litre. The fuel depot is in Plymouth. So only about 80 miles away.

Good. I often say 'for every rule we have that says you must do something, we have another rule that says you can't'.

Why would a local generator sell at a lower rate to locals when they can supply at a higher rate nationally. It is the same arguement with natural gas.

I made a similar suggestion some years ago. The compressor is not the expensive part of the unit. One problem with 'adding an extra unit' is our planning law. I think there is a 0.6m3 rule, over that requires planning, no matter which fits it. Like the electricity market, our planning rules need a major overhaul.

Think this shows it on page 7. https://files.bregroup.com/bre-co-uk-file-library-copy/filelibrary/rpts/uvalue/BR_443_(2006_Edition).pdf

@Owain1602 I did think about using an equation based on the cooling laws, but ran out of time. The idea of a boundary layer of air is an interesting one, it is used in building heat loss calculations. Not sure how much difference that will make in an airing cupboard, but may have a look when forced to stay inside for a day (usually when car is being serviced). Thanks for the feed back.

Depending on the fungal type, temperature, humidity and exposure to UV irradiation, either an alkaline, or acidic, solution can stimulate growth. Fungi are a natural miracle when it comes to survival. Have outlived just about everything on the planet.

The real problem with water is the damage caused by leaks. In some ways, I think that all that stuff needs to be in a separate building, or at least a properly 'designed for failure' plant room.

Well today is St. George's day, so easy to remember.

I can see the likeness.

A total rip off, until something goes wrong. Then you loose the money you spent on servicing and the insurance premiums. And people wonder why I think vented DHW systems are better, though I suspect the insurance companies have that covered. As you are talking around £300-£350 a year, with a potential catastrophic failure every 15 years, though it could happen any time, I would not bother.

What, getting caught out.

Cheap microcontroller, an even cheaper 1Wire temperature sensor and some basic coding, which will be already written for an ESP32 or Raspberry Pi. You would love it, more data than a Spreadsheet can handle.

Why not put a temperature logger into the ground at the depth the pipe will be fitted. That, along with the local air temperature, will give you enough data to make a properly informed decision. Be wary of asking people how a device that costs thousands is performing, they won't want to loose face. Real numbers won't lie to you. (Not so sure about those irrational and imaginary ones, have to ask the Cardinals)

How about banning lobbying from/by/to. Or even more radical, policy makers must have a course on the topic they are making policy on. It need not be 'degree level', just a basic understanding.

https://www.cfsnet.co.uk/s-n2pstk-002/2-part-polyurethane-foam-part-a-part-b-2kg-kit/ Why not just roll it around the garden.

Easy, smoke tests. I shall buy 200 Marlboro and come around and test every room.

Think you are right, I zoomed in a bit more on the phone screen. It seems to have that waxy sheen to it. k-value of 0.032 then.